3 ms·

I meant who is selling it to clearbit...

• chatmasta 8y ago
  Considering clearbit started at a time when there was not so much focus on privacy and customer data protections... I’m gonna take a wild guess here and say they are scraping it from publicly available (ish) sources. That is discounting the obvious possibility of looking at ARIN allocations, where in some cases the IP address might be registered to an ASN belonging to the company. In that case it’s a simple lookup.
  • bigiain 8y ago
    Not for me. The ARIN allocation and reverse dns lookup of my external ip address both show the ISP we use.
    • x0x0 8y ago
      Yeah, it's definitely not ARIN. Perhaps tracking via frequent flyer signins? That would do a good job of getting business users.